How Much Protein Should I Be Taking? | Start With the RDA

The general Recommended Dietary Allowance (RDA) for protein is 0.8 grams per kilogram of body weight (0.36 grams per pound) for sedentary adults.

You probably hear “eat more protein” constantly — from fitness influencers, food brands, and maybe even your doctor. It hardly needs to be said that more steak, eggs, and Greek yogurt isn’t exactly a hardship. But the question how much usually gets a vague answer.

The honest answer is that protein needs exist on a spectrum. The official baseline printed on food labels is designed for a completely sedentary person, and its main job is preventing outright deficiency. Most of you reading this likely need more than that, and the number depends mostly on body weight and daily movement.

The RDA Is a Floor, Not a Ceiling

The Recommended Dietary Allowance (RDA) for adults 18 and older is 0.8 grams of protein per kilogram of body weight. The Food and Nutrition Board of the Institute of Medicine helped set this standard decades ago as a minimum requirement for the average person.

For a 150-pound (68 kg) sedentary adult, that math lands at roughly 55 grams of protein per day — roughly the amount in an 8-ounce steak. That same steak is supposed to cover the full day for a person of average size.

The catch is that the RDA of 0.8 g/kg is designed to prevent deficiency and nothing more. It doesn’t aim to optimize muscle growth, support athletic performance, or offset age-related muscle loss. It’s a baseline, and most people can benefit from getting more protein than this minimum.

Why Your Activity Level Changes the Number

The biggest factor that shifts protein needs above the RDA is how much you move. The standard recommendation treats everybody like they sit at a desk all day and then sit on the couch at night. Real life looks different, and the ranges adjust accordingly.

• Sedentary adults: 0.8 g/kg is generally sufficient. It maintains basic body structure without any surplus for repair or growth.
• People who exercise regularly: 1.1 to 1.5 g/kg. Mayo Clinic notes that moderate physical activity elevates the need for protein for muscle repair and recovery.
• Athletes and strength trainers: 1.2 to 1.7 g/kg. Mass General Brigham reports that people who regularly lift weights or train for endurance events sit in this higher range.
• Older adults over 50: Often advised 1.0 to 1.2 g/kg. Higher intake can help counteract sarcopenia, the natural age-related loss of muscle mass.
• Recovery from illness, surgery, or wounds: Needs are elevated above standard. The body needs more raw material to rebuild damaged tissue.

These ranges aren’t strict boundaries. A recreational jogger can eat in the athlete range on heavy training days, and a bodybuilder can drop lower on rest days without losing much progress.

How to Calculate Your Personal Target

The math is straightforward. Take your weight in kilograms — divide pounds by 2.2 — and multiply by the grams-per-kilogram range that fits your lifestyle. Harvard Health’s overview of the RDA for protein makes clear that this number is just the starting point, not the final target.

Consider a 180-pound person who lifts weights three times a week. They weigh roughly 82 kilograms. Using the middle of the active range — 1.4 grams per kilogram — their daily target is about 115 grams of protein. That sounds like a lot compared to the 55-gram RDA, but an 8-ounce chicken breast alone provides close to 50 grams, making the rest of the day entirely manageable.

The table gives you a quick estimate, but the best approach is to pick a number at the lower end of your lifestyle range, eat that way for a week, and see how your energy and recovery feel. Adjust upward if you’re hungry or sore between workouts.

Practical Ways to Hit Your Protein Goal

Figuring out the target is the easy part. Fitting between 55 and 110 grams or more into a real day without eating plain chicken breast at every meal requires a small strategy shift. Here are four approaches that help.

1. Distribute protein across three or four meals. Aim for 25 to 35 grams per meal. A single massive dinner won’t buy you the same muscle-building benefit that spreading the load across breakfast, lunch, and dinner does.
2. Start at breakfast. Most people eat a carb-heavy morning meal. Adding eggs, Greek yogurt, or a protein shake immediately brings the daily total closer to the target and helps stabilize appetite through the morning.
3. Include complete proteins at each eating window. Animal sources — meat, eggs, dairy — contain all nine essential amino acids. Plant-based eaters need to pair grains with legumes or soy to get that complete profile.
4. Consider the 30-30-3 framework. Some health experts recommend eating 30 grams of protein at breakfast, 30 grams of fiber per day, and three servings of probiotic-rich foods for better digestion and appetite control.

The 30-30-3 method is one option, not a rule carved in stone, but the breakfast part of that framework tends to make the biggest difference for people who usually skip protein in the morning.

Is There Such a Thing as Too Much?

Yes, excessive protein intake is possible. Mayo Clinic defines excessive as more than 2 grams per kilogram of body weight each day. For a 200-pound person, that’s roughly 180 grams daily — a very high bar for anyone not intentionally trying to hit it.

Stanford Medicine’s feature on the 55 grams protein daily baseline underscores how wide the gap is between the RDA and the upper limits. Most people will land somewhere in the middle, not at either extreme.

For healthy kidneys, the higher end of the range is generally well-tolerated. People with chronic kidney disease or other kidney conditions should check with their doctor before intentionally increasing protein because excess nitrogen waste can strain compromised kidneys.

The table shows just how far apart the minimum and a mid-range active target can be. A 160-pound person doubling their protein overnight might feel bloated or heavy, but they’re still far below the “excessive” threshold of 2 g/kg.

The Bottom Line

The official RDA is a minimum for preventing deficiency, not a number designed to optimize energy, muscle, or recovery. Most active adults benefit from eating between 1.2 and 1.5 grams per kilogram of body weight spread across three or four meals. Calculating your target takes thirty seconds with a kitchen scale and a calculator.

If you manage chronic kidney disease or a metabolic condition requiring specific macronutrient adjustments, a registered dietitian is the right person to tailor the 0.8 to 1.7 g/kg range to your labs and medications — the standard calculators don’t account for individual health history.